Hi,
I can develop that Shopify webapp similar to teelaunch.
Please contact me for more details and samples of my work.
I'm an expert web developer, with over 10 years of experience in PHP, WordPress, HTML5, PostCSS, CSS Modules, LESS, NodeJS, AngularJS, ElasticSearch, ReactJS, Gulp, AWS, Webpack, MongoDB, Socket.io.
Best regards,
Dmitry